345 +298

568 +399

386 +297

546 +399

748 +198

427 +395

865 +799

768 +497

change 298 to 300, and add 345+300=645 and then subtract 2 and your answer is 643

change 399 to 400 and add 500 and then add 67 to make 967

you have to add 68 not 67

345 -298	568 -399	386 -297		546 -399		748 -198	427 -395	865 -799	768 -497
									take 3 from 768 and give it to 497 then subtract 765 - 500 = 265
									actually add 3 to 497 to get 500 then do 768-500 to get 268 then add 3 because you took away too many to get 271.

Change the problem to make it easier to multiply. For example, you can multiply one number by two
if you multiply the other by 1/2. Try making your own and solving it in the top row.

16 x 5

28 x 5

24 x 5

148 x 5

248 x 50

128 x 50

468 x 500

Multiply by Splitting

When one number of a multiplication pair has two digits, try splitting that number into two parts by dividing it by 2.
Example: 9 x 12
Split 12 into two parts: 12=6x2
Instead of 9x12 (9x6x2) think 9 x 6 and then double it.
9x6=54 Double 54 and you get 108.

1. 8 x 16

2. 5 x 22

3. 6 x 18

4. 7 x 14

5. 9 x 16

6. 12 x 24